With respect to block chain or bitcoin. None of this is being adopted unless they can use it to enslave humanity. Bitcoin doesn't allow it. Digital currency is just another fiat currency so there's no change there. My prediction is governments will adopt bitcoin as a reserve currency similar to how they did with gold in the past but these will be small countries that have the biggest problems with currencies. First, corporations will pick up bitcoin then governments will follow. It's not enthusiastically, more like kicking and screaming as a last resort.
Improbable. There's absolutely no way bitcoin can scale to handle that much volume of transactions from huge corporations let alone WORLD GOVERNMENTS unless it's forked and run on a different chain, which means a completely different coin.
The banking system is way worse than simply making your transactions transparent. They sell that info already and the government can see your transactions all day, reverse them, freeze them, steal it etc.
The reason blockchain is so hated by governments and banks is because it turned the transparency back on them. With bitcoin you know what the monetary policy is, how much bitcoin there will be in the future, how much inflation there will be, how it is spent etc. Nobody can freeze or reserve transactions. They can see transactions but there are no names attached to it. The banking system is the opposite of this. They don't tell you how much money is printed, how much there will be in the future, what the interest rates will be. It's totally opaque, centrally controlled. Adopting bitcoin is giving up control and that'll never happen for most governments. Imagine what the government would do if they couldn't print money on command like magic to fix all their problems. They'd actually have to become efficient because stealing from their citizens would be off the table.
Not sure what you're getting at here. Bitcoin is just a speculative asset - it's not backed by anything - just like how the U.S. dollar isn't backed by anything. The government has already "adopted" bitcoin. Look at Coinbase, Binance, Kraken or any other big centralized exchange that is given permission by the U.S. government to allow people to trade on their exchanges only after their customers fill out KYC forms. Now why do you think that is?